Partially Coherent Channel Estimation Algorithm based on IR

LI Gui-yong; LI Ping-an; LI He-bin

doi:10.13756/j.gtxyj.2021.04.003

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Partially Coherent Channel Estimation Algorithm based on IR

- Partially Coherent Channel Estimation Algorithm based on IR
- Study on Optical Communications Issue 4, Pages: 10-14(2021)
- 作者机构：
  
  重庆邮电大学　通信与信息工程学院，重庆　400065
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2021.04.003
  CLC： TN929.5
- Published：10 August 2021，
  
  Received：24 November 2020，
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LI Gui-yong, LI Ping-an, LI He-bin. Partially Coherent Channel Estimation Algorithm based on IR. [J]. Study on Optical Communications (4):10-14(2021)
DOI：

LI Gui-yong, LI Ping-an, LI He-bin. Partially Coherent Channel Estimation Algorithm based on IR. [J]. Study on Optical Communications (4):10-14(2021) DOI： 10.13756/j.gtxyj.2021.04.003.

摘要

对于具有混合预编码的毫米波大规模多输入多输出（MIMO）系统，由于系统中硬件的缺陷会在接收的导频中引入随机相位偏移，这将使得传统信道估计算法的性能变得非常差，甚至不能估计出信道信息。为了解决这个问题，文章利用来自不同射频链的导频，在同一时间段内具有相同的相位偏移，而在不同时间段具有不同的相位偏移的特性，提出了基于迭代重加权（IR）的部分相干压缩相位提取（PC-CPR）（IR-PC-CPR）算法。该算法首先对接收的相干导频做相位偏移补偿，然后再使用IR算法估计信道参数来实现高精度的信道估计。仿真结果表明，文章所提算法与PC-CPR算法相比具有更好的性能。

Abstract

For millimeter-wave large-scale Multiple-Input Multiple-Output (MIMO) systems with hybrid precoding

due to the hardware defects in the system

random phase shifts will be introduced in the received pilots

which will make the performance of traditional channel estimation algorithms become very poor. In some extreme conditions

even the channel information cannot be estimated. In order to solve this problem

this paper uses pilots from different radio frequency chains to have the same phase offset in the same time period

and pilots in different time periods have different phase offset characteristics to estimate the channel information with an Iterative Reweight (IR) based Partially Coherent-Compressive Phase Retrieval (PC-CPR) (IR-PC-CPR) algorithm. The algorithm first performs phase offset compensation on the received coherent pilots

and then uses an iterative reweight (IR) algorithm to estimate channel parameters to achieve high-precision channel estimation. The simulation results show that the algorithm proposed in this paper has better performance than the PC-CPR algorithm.

关键词

毫米波混合预编码压缩相位提取迭代重加权

Keywords

millimeter wavehybrid precodingCPRIR

references

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